Lee, R. E. (1966). Continuing education for adults through the American public library, 1833-1964. American Library Association.
Lua i Stíl Chicago (17ú heag.)Lee, Robert Ellis. Continuing Education for Adults Through the American Public Library, 1833-1964. Chicago: American Library Association, 1966.
Lua MLA (9ú heag.)Lee, Robert Ellis. Continuing Education for Adults Through the American Public Library, 1833-1964. American Library Association, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.